Yarn-tensioning device



T..A. AND H. A. BOYD.

YARN TENSIONING DEVICE.

APPLICATION FILED JAN. 19, 1920.

1,333,059, Patented Mar. 9,1920.

THOMAS ALEXAND orn Ann Hartman,

UNITED sratrns PATENT O FICE,

xsnngrnivsionme nnvion'.

antenna Born,

or etnseowi, .scmam Specification of Letters Patent. I .Patentd.,lvtan g, 1920,

a pease filed Jeannie- 1920. Serial no. 352,566."

i 1 b an whom it may concern:

Be it known that we, THOMAS ALEXANDER BoYn and HAROLD ARTnnnBoYn,subjects oi the King of theUnited Kingdom of Great Britain and Ireland, and reslding at Shet- 'tlcston, Glasgow, Scotland, have invented a certain new and useful Improvement in )4 arn-Tens1on1ng Devices, of whlch the fol:

lowing isaspecification. I I

This invention relates to a yarn tensioning device associated with a pendulous memher supporting a bobbin, cheese or the like which is rotated by the pullof the yarn as it is unwound; I I I I A construction according to the invention includes a pendulous member mounted to swing on an axis above, and in the same vertical plane as the axis of the bobbin, cheese or the like, the latter or a brake wheel on which it rests and which participates in the rotation of the bobbin, cheese or the like being unwound, being adapted to contact with and receive drag from a fixed brake,

the pendulous member being so balanced that the pull of the yarn pulls the-bobbin, cheese or the like away from the fixed brake when an undue. strain comes on the yarn.

-The invention is illustrated by way of example in the accompanying drawings in which Figures 1 and 2 are elevations at right angles to each other.

Referring to the drawings, 1 denotes a bobbin mounted. on a brake wheel 2 coaxial with a vertical splndle 3 carried man 011.

socket 4, the tubular hub of the bobbin being impaled on the spindle 3.

The socket 4 is of T-sh'ape and to each end of the horizontal limb of the T-member is attached a wire'5 extending upward for a suitable distance and out-turned at its upper end as at 6 to form a pivot. The wires 5 are braced together to form a pendulouscarrier swinging on the coaxial pivots 6 which enter bearing orifices in a bracket. 7 vertically above the socket, the pivotal axis of the pendulous carrier being in the same vertical plane as the spindle 3.

Contiguous with the brake wheel :2, at the side of the bobbin opposite that from which the yarn is drawn,is a fixedbrake shoe 8 I of leather or othermaterial. I I

By means of an adjustable weight 9' the pendulous member is urged in the direction to press the brake wheel 2 against the fixed brake 8 to the required extent. I

As will be-understood, should the yarn be from a bobbin," cheese nation, a vertical spindle adapted to receive subjected to strain in excess of-that pre determined by the adjustment of-the weight,

with the periphery of the lower tionof the bobbin, cheese or the like in the unwinding of the yarn, a penduloussupport for said spindle, said support pivoted on'an axis located above and in substantially the same vertical plane as said spindle, and a brake for imposing drag on the yarn, said pendulous support being so mounted/and balanced .as normally to" maintain the bob bin, cheese or the like under the influence of said brake, but adapted to withdraw'the bobbin, cheese or the like from'said brake when the yarn is exposed to excessive strain.

2. For controlling the unwinding of yarn or the like, 1n combithe bobbimcheese or the like, a brake wheel applied to said spindle, a pendulous support forsaid spindle and brake wheel, said supportpivoted on an axis located above, and

*in substantially the same vertical I said spindle, a fixed brake I plane as contiguous to the periphery of said brake. wheel, said support so balanced that said brake, wheel is normally hinged against said fixed brake, said support being free to move on its pivot to retra'ctsaid brake wheel from said fixed brake when'the yarn is subjected to undue strain.

3. For controlling 'the unwinding of yarn from a bobbin, cheeseor the like, in combination, a vertical spindle adapted to receive the bobbin, cheese or the/like, a brake wheel on saidlspindle, on which-brake wheel the bobbin rests, a's'ocket toreceive said spindle, a pendulous supportfor said socket, said support pivoted on an axis above said spindle and in plane as said spindle, a fixed brake contiguone to the said support so balanced I that said brake periphery of'said brake wheel,

substantially the same vertical- Wheel is normally urged against said fixed brake, said support being free to move on its pivot to retract saidbrake Wheel from said fixed brake when the yarn is subjected to undue strain. 1 i

4. For controlling the unwinding of yarn from a bobbin, cheese or the like, in combination, a brake Wheel rotatable around a vertical axis on the unwinding ofthe yarn, a brake shoe cooperating with said brake Wheel for imposing drag on the yarn,'and a pendulous support for said brake Wheel said support mounted on a pivot above and in substantially the same ver tical plane as the axis of said brake ivheelpar d be- 15';

ingadapted to perm it movement of said.

brake Wheel away from said brake shoe when the yarn is subjected to undue strain.- In testimony whereof We have slgned our names to this specification in the presence of '20 two subscribing Witnesses; l

THOMAS ALEXANDER BOYD. HAROLD ARTHURBGYD. Witnesses: i p

I ISABEL Rome, 1 FLORENCE HoUsToN, 

